Distillation of Binary Mixtures. 533 



the distillates were not directly observed, but were calculated 

 from the condition of the liquid before and after as already 



mentioned. 



Percentage Strengths. 



Date (1898). 



Liquid. 



Vapour. 





Sept. 21 



14-5 



18-0 

 20-3 

 23-3 

 25-2 

 27-4 

 290 

 32-8 



4 46 

 12-8 

 189 



324 



44-2 

 56-6 

 68-8 

 88-3 



„ 28 



Oct. 10 



12 



„ 14 



15 



„ J8 



„ 19 





The results are plotted in Curve B, fig. 3. 



Ammonia and Water. 



In this case the analysis was by specific gravity and the 



results were somewhat rough, the intention being merely to 



obtain an approximation to the form of the curve. On this 



account they are plotted upon a smaller scale C, fig. 4, the 



Fig. 4. 



100 



mm 



O 100 



C. Ammonia and Water. D. Sulphuric Acid and Water. 



dotted portion of the curve being conjecturally added to 

 indicate the progress towards the corner of the square. 



